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    Surfing to website in the subnet of another interface shows pfsense login page

    Scheduled Pinned Locked Moved NAT
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    • GertjanG
      Gertjan @Voxtra
      last edited by Gertjan

      @Voxtra said in Surfing to website in the subnet of another interface shows pfsense login page:

      we have a pfsense with 3 physical interfaces for internal networks:
      LAN1: 200.1.0.0/24
      LAN2: 10.20.15.0/24
      LAN3: 10.0.0.0/16

      Ok for LAN 2 and 3, but with LAN 1, something seems very wrong here.
      You are, or you own :

      root@ns311465:~# whois 200.1.0.15
      ....
      % Copyright LACNIC lacnic.net
      %  The data below is provided for information purposes
      %  and to assist persons in obtaining information about or
      %  related to AS and IP numbers registrations
      %  By submitting a whois query, you agree to use this data
      %  only for lawful purposes.
      %  2024-03-25 13:14:56 (-03 -03:00)
      
      inetnum:     200.1.0.0/22
      status:      allocated
      owner:       Corporacion Andina de Fomento.
      ownerid:     VE-CAFO-LACNIC
      address:     Av. Luis Roche, Torre Central\nPiso 7, Altamir\nCaracas
      country:     VE
      owner-c:     JL10-ARIN
      created:     19930513
      changed:     19930513
      source:      ARIN-HISTORIC
      

      That's already a big player, as you own 1024+ IPv4 on the net.
      Using one /24 network on your pfSense .... as a LAN (internal) network ? Are you sure ??

      No "help me" PM's please. Use the forum, the community will thank you.
      Edit : and where are the logs ??

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      • johnpozJ
        johnpoz LAYER 8 Global Moderator @Voxtra
        last edited by johnpoz

        @Voxtra said in Surfing to website in the subnet of another interface shows pfsense login page:

        When we browse to https://200.1.0.15 we end up seeing the https login page of the pfsense

        yeah that wouldn't happen unless pfsense IP was .15.. Are you access via the IP or via some fqdn? When devices on the same network talk to each other say .x talking to .y pfsense would not even be aware of the traffic unless your running on a bridge in pfsense? or one of pfsense IPs is .x or .y in that conversation.

        And with @Gertjan using public IP space on your internal network is not a very good idea.. Are you part of the Corporacion Andina de Fomento. I find highly unlikely even if you were that they would assign a /24 out of their /22 to your connection?

        An intelligent man is sometimes forced to be drunk to spend time with his fools
        If you get confused: Listen to the Music Play
        Please don't Chat/PM me for help, unless mod related
        SG-4860 24.11 | Lab VMs 2.8, 24.11

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        • M
          michmoor LAYER 8 Rebel Alliance @johnpoz
          last edited by

          @johnpoz
          Couldve been a network space he randomly selected as part of a test. Im guilty of using 1.1.1.0/30 on WAN links when labbing.
          Still its a directly connected interface so its routed to pfsense itself. Shouldnt be an issue.

          Firewall: NetGate,Palo Alto-VM,Juniper SRX
          Routing: Juniper, Arista, Cisco
          Switching: Juniper, Arista, Cisco
          Wireless: Unifi, Aruba IAP
          JNCIP,CCNP Enterprise

          johnpozJ 1 Reply Last reply Reply Quote 0
          • johnpozJ
            johnpoz LAYER 8 Global Moderator @michmoor
            last edited by

            @michmoor while technically you can use it, sure if you don't ever want to go to that space on the public.. But its really bad practice to get into.. Because as some point your going to use some public space locally that you actually want to get to.

            And it always brings up such questions when your posting asking for help ;)

            There is plenty of rfc1918 space to use, that you don't have to step on something your currently using..

            An intelligent man is sometimes forced to be drunk to spend time with his fools
            If you get confused: Listen to the Music Play
            Please don't Chat/PM me for help, unless mod related
            SG-4860 24.11 | Lab VMs 2.8, 24.11

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            • V
              Voxtra @johnpoz
              last edited by

              @johnpoz
              the pfsense is on IP addresses
              200.1.0.250 in LAN1
              10.20.15.254 in LAN2
              10.0.0.254 in LAN3
              there is no reference to 200.1.0.15 in the pfsense, except for NAT rules on the WAN that forward to this IP-address

              Regarding the comments about using the 200.1.0.0/24 range -> that is why we've created the LAN3 on 10.0.0.0/16.
              Our customer had this 200-range when we took over their setup. We are now moving everything step by step to the 10.0.0.0-range, so we can get rid of the 200-range. But during this process, everything should keep working.

              Main problem is still that I can't get to route from one subnet/interface to one IP-address on the other interface.
              The other subnet LAN2 routes perfectly.
              And from the LAN3 subnet, I can also get to other websites in the LAN1 subnet. It's just that one website that won't work. It's not DNS as it pings 200.1.0.15 ok. But when browsing to this IP, how is it possible that I get the pfsenses login page?

              johnpozJ 1 Reply Last reply Reply Quote 0
              • johnpozJ
                johnpoz LAYER 8 Global Moderator @Voxtra
                last edited by johnpoz

                @Voxtra it shouldn't be possible it really shouldn't.. Just because you can ping, doesn't really mean anything.

                So your on a device in the 200.x network - ping this 200.1.0.15 address now look in your arp table.. What does it show for that IP.. Is it a pfsense mac? If not pfsense is not invovled in the conversation in any way.

                Maybe the client thinks this .15 address is not actually on its local network.. What Is the mask on the client your trying to access the 200.1.0.15 address from

                And good to hear about migration away from the 200.x network - very valid reason to currently have it setup.. thanks for keeping my curiosity kat happy ;)

                An intelligent man is sometimes forced to be drunk to spend time with his fools
                If you get confused: Listen to the Music Play
                Please don't Chat/PM me for help, unless mod related
                SG-4860 24.11 | Lab VMs 2.8, 24.11

                V 1 Reply Last reply Reply Quote 0
                • V
                  Voxtra @johnpoz
                  last edited by

                  @johnpoz
                  the mac of 200.1.0.15 start with 00:50:56 which is VMWare. This is correct, it is a virtual machine.
                  the client from which I'm trying to browse to 200.1.0.15 has IP address 10.0.0.2, subnet mask 255.255.0.0, gateway 10.0.0.254
                  I just don't get why I can ping it, but browsing to it gets redirected...

                  johnpozJ 1 Reply Last reply Reply Quote 0
                  • johnpozJ
                    johnpoz LAYER 8 Global Moderator @Voxtra
                    last edited by johnpoz

                    @Voxtra oh so your accessing this IP from a different network.. I thought you were on some box in 200.x and trying to access 200.1.0.15 and getting pfsense login..

                    And you have no port forwards setup? No policy routing via gateway set in you rules on this 10.0 psense interface? What are you outbound nats?

                    Your saying you can access fine from your other 10.20 network, not just this 10.0 network.. And it works fine as well from device on the 200.x network.

                    An intelligent man is sometimes forced to be drunk to spend time with his fools
                    If you get confused: Listen to the Music Play
                    Please don't Chat/PM me for help, unless mod related
                    SG-4860 24.11 | Lab VMs 2.8, 24.11

                    V 2 Replies Last reply Reply Quote 0
                    • V
                      Voxtra @johnpoz
                      last edited by

                      This post is deleted!
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                      • V
                        Voxtra @johnpoz
                        last edited by

                        @johnpoz
                        oh so your accessing this IP from a different network.. I thought you were on some box in 200.x and trying to access 200.1.0.15 and getting pfsense login..

                        correct, that is the issue
                        And you have no port forwards setup?
                        only from WAN to LAN1, not from LAN2 to LAN3 and also not from LAN2 to LAN3
                        No policy routing via gateway set in you rules on this 10.0 psense interface?
                        No
                        What are you outbound nats?
                        None, only the automatically created rules
                        Your saying you can access fine from your other 10.20 network, not just this 10.0 network.. And it works fine as well from device on the 200.x network.
                        that is correct

                        V 1 Reply Last reply Reply Quote 0
                        • V
                          Voxtra @Voxtra
                          last edited by

                          Just wanted to let you all know that we've made a workaround, since it was urgent and could not easily be solved. Thanks for your help!

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